.ad-container {
    margin: 2rem auto;
    text-align: center;
    min-height: 90px;
    background: #f9f9f9;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.ad-container::before {
    content: "Publicidade";
    position: absolute;
    top: 5px;
    left: 10px;
    font-size: 0.7rem;
    color: #999;
    z-index: 1;
}

.ad-horizontal {
    width: 100%;
    max-width: 728px;
    height: 90px;
    margin: 0 auto;
}

.ad-rectangle {
    width: 100%;
    max-width: 336px;
    height: 280px;
    margin: 0 auto;
}

.ad-skyscraper {
    width: 300px;
    height: 600px;
    margin: 0 auto;
}

.ad-mobile {
    width: 300px;
    height: 250px;
    margin: 0 auto;
    display: none;
}

.ad-between {
    margin: 3rem 0;
    padding: 1rem 0;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.ad-label {
    font-size: 0.7rem;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    text-align: center;
}

@media (max-width: 768px) {
    .ad-horizontal {
        height: auto;
        min-height: 250px;
    }
    
    .ad-desktop-only {
        display: none;
    }
    
    .ad-mobile {
        display: block;
    }
}